/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.servlet;

import com.dao.PostDAO;
import com.entities.PostType;
import com.entities.Posts;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

/**
 *
 * @author Min Tun
 */
public class AdminController extends HttpServlet {
    private static final String adminHome = "admin.jsp";
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String xmlPath = getServletContext().getRealPath("/") + "WEB-INF/posts.xml";
            String action = request.getParameter("btAction");
            if(action.equals("approvePost")){
                String id = request.getParameter("pID");
                PostDAO dao = new PostDAO();
                Posts posts = new Posts();
                try {
                    File f = new File(xmlPath);
                    JAXBContext context = JAXBContext.newInstance(Posts.class);
                    Unmarshaller um = context.createUnmarshaller();
                    posts = (Posts) um.unmarshal(f);
                    for (int i = 0; i < posts.getPost().size(); i++) {
                        PostType p = posts.getPost().get(i);
                        if(p.getId().equals(id)){
                            int result = dao.insertPost(p);
                            if(result == 1){
                                posts.getPost().remove(i);
                            }
                        }
                    }
                    //Write new xml
                    Marshaller m = context.createMarshaller();
                    m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
                    m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
                    m.marshal(posts, new File(xmlPath));
                    response.sendRedirect(adminHome);

                } catch (JAXBException ex) {
                    Logger.getLogger(AdminController.class.getName()).log(Level.SEVERE, null, ex);
                }
            } else if(action.equals("deletePostXML")){
                String id = request.getParameter("pID");
                Posts posts = new Posts();
                try {
                    JAXBContext context = JAXBContext.newInstance(Posts.class);
                    Unmarshaller um = context.createUnmarshaller();
                    File f = new File(xmlPath);
                    posts = (Posts) um.unmarshal(f);

                    for (int i = 0; i < posts.getPost().size(); i++) {
                        PostType p = posts.getPost().get(i);
                        if(p.getId().equals(id)){
                            posts.getPost().remove(i);
                        }

                    }
                    //Write new xml
                    Marshaller m = context.createMarshaller();
                    m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
                    m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
                    m.marshal(posts, new File(xmlPath));
                    response.sendRedirect(adminHome);
                } catch (JAXBException ex) {
                    Logger.getLogger(AdminController.class.getName()).log(Level.SEVERE, null, ex);
                }


            }
        } finally { 
            out.close();
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
